"Don't talk like that," Bart said, a creepy feeling coming over him. "If you're sick, let me take you to a doctor."
Briscoe did not even hear. "Wait, there is something else. Your father said, 'Tell Bart I've gone looking for the Eighth Color. Bart will know what I mean.'"
"That's crazy. I don't know—"
He broke off, for the memory had come, full-blown:
He was very young: five, six, seven. His mother, tall and slender and very fair, was bending over a blueprint, pointing with a delicate finger at something, straightening, saying in her light musical voice:
"The fuel catalyst—it's a strange color, a color you never saw anywhere. Can you think of a color that isn't red, orange, yellow, green, blue, violet, indigo or some combination of them? It isn't any of the colors of the spectrum at all. The fuel is a real eighth color."
And his father had used the phrase, almost adopted it. "When we know what the eighth color is, we'll have the secret of the star-drive, too!"
Briscoe saw his face change, nodded weakly. "I see it means something to you. Now will you do as I tell you? Within a couple of hours, they'll be combing the planet for you, but by that time the ship I came in on will have taken off again. They only stop a short time here, for mail, passengers—no cargo. They may get under way again before all messages are cleared and decoded." He stopped and breathed hard. "The Earth authorities might protect you, but you would never be able to board a Lhari ship again—and that would mean staying on Earth for the rest of your life. You've got to get away before they start comparing notes. Here." His hand went into his pockets. "For your hair. It's a dye—a spray."
He pressed a button on the bulb in his hand; Bart gasped, feeling cold wetness on his head. His own hand came away stained black.
"Keep still." Briscoe said irritably. "You'll need it at the Procyon end of the run. Here." He stuck some papers into Bart's hand, then punched some buttons on the robotcab's control. It wheeled and swerved so rapidly that Bart fell against the fat man's shoulder.